Ultrastructure of the oocytes of the Japanese eel Anguilla japonica during artificially induced sexual maturation
Bibliographic record
Abstract
Morphological changes in the oocytes of the Japanese eel, Anguilla japonica, induced to undergo ovarian development by repeated injections of salmon pituitary homogenate, were examined using electron microscopy.Oil droplets were closely associated with organelles, especially mitochondria, and increased in number as oocyte growth proceeded.They fused at the migratory nucleus stage.During vitellogenesis, two types of cortical alveoli were distinguished, one having filamentous contents, the other having latticated contents.As oocytes reached maturity, the structure of the cortical alveoli was exclusively filamentous.Yolk globules were homogeneous and highly electrondense, but electrondensity decreased during hydration.The structure of the zona radiata of previtellogenic oocytes consisted of two layers, and an additional reticular network structure was formed on the inside of the zona radiata during the vitellogenic stage.The zona radiata lost the reticular network structure and assumed a layered structure of uniform electrondensity at the migratory nucleus stage.These structural changes during oocyte development were mostly comparable to those in other teleosts.Results of the present study should assist in developing improved methods for full control of artificial maturation in the Japanese eel.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".